Arniza Fitri, Noor Aliza Binti Ahmad, Alfath Zain, Mas Mera, Dian Pratiwi
Urban expansion in Bandar Lampung, Indonesia, has exacerbated urban flooding due to increased impervious surfaces and reduced natural infiltration. Bio-pore infiltration systems are promoted as a low-cost, eco-friendly solution to enhance groundwater recharge and mitigate surface runoff. This study quantifies the effectiveness of 75 bio-pore infiltration holes installed along Seroja Street in the Way Halim Sub-watershed. Using field data on flood depth and bio-pore absorption rates, complemented by hydrological modeling, we assessed their impact. Before installation, flood depths during heavy rainfall (96.7 mm daily maximum) ranged from 25–40 cm. Post-installation, these depths decreased to 10–20 cm, representing a 40% reduction. However, our analysis reveals that based on a measured absorption capacity of 118 L/hour per bio-pore and a total impermeable area of 2640 m2, approximately 737 units are required to fully manage peak rainfall runoff for the street—indicating a significant shortfall of 662 units. These findings underscore the critical need to align green infrastructure design with site-specific hydrological parameters. When appropriately scaled, bio-pore systems offer a cost-effective and sustainable urban flood mitigation strategy for tropical regions. © 2025 The Authors, published by EDP Sciences.
Department of Civil Engineering, Faculty of Engineering and Computer Science, Universitas Teknokrat Indonesia, Bandar Lampung, Indonesia; Department of Civil Engineering, Faculty of Civil Engineering and Built Environment, Universiti Tun Hussein Onn Malaysia, Johor, Batu Pahat, Malaysia; Department of Mining Engineering, Faculty of Industrial Technology, Institut Teknologi Sumatera, Lampung Province, Indonesia; Department of Civil Engineering, Faculty of Engineering, Universitas Andalas, Padang, Indonesia; Study Program of Land and Environmental Resources Engineering, Department of Engineering, Politeknik Negeri Lampung, Bandar Lampung, Indonesia